Winding mandrel mounting



y 1953 G. R. ROBERTS EI'AL 2,836,372

WINDING MANDREL MOUNTING Filed July 6, 1954 2 Sheets-Sheet 1 WZMM 7% Tmdai kw y 1953 s. R. ROBERTS ETAL 2,836,372

WINDING MANDREL MOUNTING Filed July 6, 1954 I 2 Sheets-Sheet 2 7 M 437 j /M Wif/Z' United t tes Patent WINDING MANDREL MOUNTING George Richard Roberts, New Barn, Longfieid, and

Ronald Thomas Heathcote, Dartford, England, assignors to The Bowater Research and Development Company Limited, a company of Great Britain Application July 6, 1954, Serial No. 441,495

Claims priority, application Great Britain July 14, 1953 7 Claims. (Cl. 242-55) This invention comprises improvements in and relating to the mounting of a winding mandrel such as is used in a convolute drum winder i. e., a machine for winding paper into tubes to form the bodies of paper drums.

Usually mandrels of this type are supported and driven from one end, the other end either being left unsupported or being supported in a movable supporting member which may be moved to allow withdrawal of the wound product from the mandrel.

It is known to have a hinged yoke piece as a supporting member to support the free end of the mandrel, so that the supporting member could be swung away to allow removal of the wound tube. This arrangement is not satisfactory where large mandrels are used and it is not readily adapted for automatic control.

The object of the invention is to provide an improved mounting for a winding mandrel having a retractable mandrel supporting member well adapted for automatic actuation and for controlling, by its movement, various other operations in a machine such as a convolute drum winder.

According to the invention a mounting for a winding mandrel comprises a fixed support for the driven end of the mandrel, a retractable supporting member for the other end of the mandrel, supporting and guiding means for the supporting member whereby the latter may reciprocate towards and away from the mandrel to allow removal of the wound product and driving means for reciprocating the supporting member.

In one embodiment of the invention the mounting is used for a convolute drum winder fitted with a contractible mandrel and a pressure pad to bear on the material being wound on the mandrel. The fixed support, the movable supporting member and its supporting and guiding means are adjustable in height relative to the frame of the machine so that the top of the mandrel may be kept at a fixed height for difierent diameters of mandrel. The movable supporting member is linked with mechanism for contracting and expanding the mandrel and with mechanism for moving. the pressure pad to a retracted position so that these mechanisms are automatically actuated as the movablesupport is moved away from the mandrel,

The driving means for reciprocating the movable supporting member may comprise a channel member on the movable supporting member and disposed substantially perpendicular to its direction of reciprocation, a block slidable in said member, said block engaging with a point on a rotary member whereby as the rotary member rotates the steady is caused to reciprocate.

The retracting means for the pressure pad may comprise a second channel member fixed to the movable supporting member and disposed substantially perpendicular to its direction of reciprocation, a block slidable in said channel member, a pivoted arm adapted at one end to move the pressure pad and engaged at its other end by said block. When used with a contractible mandrel the actuating means for contracting the mandrel may be opice erated from the pivoted arm adapted to move the pressure pad.

The present invention may be used in a convolute drum winder comprising the features described in any of our co-pending applications, Serial No. 441,452, now Patent No. 2,779,547, and Serial No. 441,494, now abandoned.

An embodiment of the invention as applied to a convolute drum winder will now be described with reference to the accompanying drawings in which:

Figure 1 is a diagrammatic end elevation, and

Figure 2 is a side view partly in section and on an enlarged scale of a part of Figure l in more detail and in a difierent operative position.

Referring to the drawings, a winding mandrel 1 is carried for rotation about a substantially horizontal axis by a fixed support and comprising a substantially cylindrical shaft the free end of which is shown at 2. A movable supporting member for supporting the free end of the shaft is indicated at 3, in a retracted position. The upper end or top of the supporting member 3 is cupped at 4 to receive the free end of the mandrel shaft. The supporting member 3 carries at its lower end two parallel slideways or channel members 5, 5'. Slidable in the channel member 5 is a block 6 into which fits a projecting ing 7 keyed into a wheel 8 as shown in Figure 2. The wheel 8 is driven by a motor 9 through a worm l0 and a worm wheel 11. Slidable in the other channel member 5 is a second block 12, similar to block 6, pivotally connected at 13 to the end of an arm 14 which is fast on a rocking shaft 15 stretching across the machine.

A pair of arms, of which one is shown at 16, carrying a pressure pad 17, are freely mounted on the shaft 15 and carry counterweights 13. Fast on the shaft 15 near the supporting member 3 is an arm 19 carrying a set screw 20 which bears on the arm 16. A catch 21 actuated by a solenoid 22 is adapted to hold the arm 16 in a lowered position.

'Fast on the other end of the shaft 15, at the driven end of the mandrel, is an arm 23 connected by a link 24 to a bell crank 25 which in turn is connected by a link '26 to a slide 27 movable in guides 28 on the mandrel headstock housing. The purpose of the slide 27 is to actuate means for contracting the mandrel when a wind ing is complete to enable the wound tube to be removed from the mandrel. The mandrel for this purpose may be constructed as described in our co-pending application Serial No. 441,494.

in Figure 2 the supporting member 3 is shown in a raised position in an upper guide 29 and an extension 39 thereof in a lower guide 31 mounted in a housing 52. This housing also provides for the mounting of the wheel 8 and its associated mechanism, and a bearing for one end of the shaft 15. The housing 32'is carried by a jack screw 33 which engages with an internally threaded member fixed to the machine frame (not shown).

In operation, when it is desired to raise the supporting member 3 from the position shown in Figure 1 the motor 9 is started and the wheel 8 is driven through the worm drive 10, 11. As the wheel rotates it lifts the block 6 and through it the channel member 5 in which it slides. The channel member is fixed to the movable supporting member and so the supporting member rises, in its supporting and guiding means 29, 31 towards the mandrel i. When the supporting member 3 reaches its uppermost position, with its cup 4 supporting the shaft 2, the motor is automatically stopped by a limit switch (not shown).

Whilst the supporting member 3 is rising the second block 12 slides in its channel member 5' and swings the arm 14 which rocks the shaft 15. The rocking of the I shaft 15 raises the slide 27, by the link motion, 24, 25

and 2b. This movement of the slide 27 disengages the 7 s a i actuating means for the contraction of the mandrel and therefore the mandel is allowed to expand.

The rocking of 'theshaft' 15 also causes the arm 19 and set screw 20to move away-. from the pressurepad arm 16 so that when'the catch 21 is released the counterweights 18*Will bring the pressure pad to bear on material 7 being wound on themandrel; a V The arrangementisinow set to start winding, the man:

'drel is fully supported and has expanded. The pressure pad is held away from the mandreluntil the fir st lap of paper has been wound. Then the solenoid 22 is operated to raise the catch 21 .to bring the pressure pad into operation as already mentioned; 7

When the winding hasifinished, the motor 9 is again started and the supporting member S lo Weredin a h2anner similar to that in which it was raised i. e., the wheel 3 causes the block'o" to bring the channel to itslowest position as shown inFigure 1. Also the block iffifshdes in the channel S'sWinging' the arm 14 which rocks the shaft thus. lowering the slide 27 through the link motion 24,25/2'6 to operate the mandrel contracting means so that the wound tube may be withdrawn. .At

the same time the arm ."19 moves the-set screwifi in,

contact with the arm 16 and retracts the pressure pad from the mandrel until it is caught by the catch 21.

What is claimed is: V d V l. In combination, a fixed support for a winding mandrel, one end of said support .being free and unsupported, a movable supportingimember.engageable beneath the free end of said support, means'mounting and guiding said movable supporting member for vertical reciprocating movementfrom an'upper position in'which it is engaged with said free end of said support and a lower position in which it is disengaged from= said free end of said support and arranged radially beyond the mandrel and the material thereon to provide for the endwise removal of the material'o'n the mandrel, a slideway fixed free end of said support and a lower position in which itsv upper end is arranged radially beyond the mandrel and the material .thereon,.means for guiding said movable support for said vertical movement, a horizontal slideway carried by said movable supporting member, a block horizontally slidable in said-support, a rotatable wheel having rotatable connection with said block eccentrically or" said wheel whereby rotation of said wheel moves said block vertically to move said movable supporting member between its two said positions, a pressure device movable between an operative position engaging the material on the mandrel and a retracted inoperative position, and means connected between said movable support and said pressure device for moving the latter to its retracted position upon downward movement of said movable supporting member. V i

3. The combination according to claim Z'wherein the means for moving said pressure device comprises an arm pivoted for movement on V I chanical connection with said. movable supporting member to be swung thereby about said axis, and means for transmitting movement from said arm to said pressure,

device. a

4. The combination according toclaim l wherein the a ment of said movable supporting member-m ovessaid 611% device to its retracted position, and a latch de- "vice engageable with said=pre sure device when the latter. retracted position for'holding it in such posireaches its tion.

drel, one end of said support being free and unsupported,

a movable supporting member adapted to engage said. free end of said support, means mounting andguiding said movable supporting member for reciprocatingmovea merit from one positionin which it isengaged with said free end of said support to another position in which it is disengaged from said free end of said supporttoenable endwise removal of wound material from said support, a pressure device, means connecting said pressure device to said movable supporting member .for 'movement of said'pressuredevice in response to reciprocating movement of said movable'supporting member to' said another position for moving said pressure device from a position in which it is adapted to bear against wound material to a retract d' position-in which it cannot bear against wound material, and operating means for. reciprocating said movable supporting member to and from its said positions. t H

6. The combination according to claim 5 providedwith means operative when said pressure device is moved to its retracted position by said connecting means for iholding said presure device in its retracted position. V

7. In combination, a fixed support for a rotatable winding mandrel, one end of said support being fre'e and unsupported, a movable supporting ,member havingfa part shaped for receptionof said free end of said sup port, means mounting and guiding said movable supporting member for reciprocating movement {perpendicular to the axis of rotation of the mandrel from an ,upp er endwise removal of wound material from-said support,

and operating means for reciprocating;saidmcmber to and from said positions. 1 l

References Cited in thefile or this patent UNITED STATES PATENTS Cadorette'et :11. Aug. 2, 1955 a fixed axis and having me-, I

5. In combination, a fixed support for a mani 

